There is a hilarious (but too long for the blog) story about how I mis-measured the head tube on this bike after building it and panicked. Suffice to say that plastic calipers and hot metal can lead to... problems. Or to sum up even more succinctly: I'm an idiot.
Regardless, the head tube is actually fine. Jon built her up and is enjoying the Lefty fork with the big wheels. Check it out!